EP2247433A1 - Clavette électrique chauffante - Google Patents

Clavette électrique chauffante

Info

Publication number
EP2247433A1
EP2247433A1 EP09716908A EP09716908A EP2247433A1 EP 2247433 A1 EP2247433 A1 EP 2247433A1 EP 09716908 A EP09716908 A EP 09716908A EP 09716908 A EP09716908 A EP 09716908A EP 2247433 A1 EP2247433 A1 EP 2247433A1
Authority
EP
European Patent Office
Prior art keywords
wedge
welding
heating resistor
heating
electric hot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09716908A
Other languages
German (de)
English (en)
Other versions
EP2247433B1 (fr
Inventor
Ulrich Gubler
Hannes KÜHL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leister Technologies AG
Original Assignee
Leister Process Technologies
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leister Process Technologies filed Critical Leister Process Technologies
Publication of EP2247433A1 publication Critical patent/EP2247433A1/fr
Application granted granted Critical
Publication of EP2247433B1 publication Critical patent/EP2247433B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional [2D] plane, e.g. plate-heater non-flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B29C66/73521—Thickness, e.g. very thin of different thickness, i.e. the thickness of one of the parts to be joined being different from the thickness of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81413—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being non-symmetrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167—Quick change joining tools or surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B29C66/91423—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools using joining tools having different temperature zones or using several joining tools with different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81262—Electrical and dielectric properties, e.g. electrical conductivity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
    • B29K2709/02—Ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2905/00—Use of metals, their alloys or their compounds, as mould material
    • B29K2905/08—Transition metals
    • B29K2905/12—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2905/00—Use of metals, their alloys or their compounds, as mould material
    • B29K2905/08—Transition metals
    • B29K2905/14—Noble metals, e.g. silver, gold or platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/02—Ceramics

Definitions

  • the invention relates to an electric hot wedge for a welding device for seam-like joining of plastic webs, with a welding wedge and a welding wedge suspension, wherein the welding wedge has at least one electrical heating resistor with a heating conductor, which is applied as conductive layer cohesively on a ceramic support and preferably protected by a ceramic cover layer is.
  • Electric heating wedges for marginal bonding of plastic sheets are known per se and are used in particular in automatic welding devices in various embodiments.
  • the plastic sheets are plasticized at their contact surfaces in the overlap welding of plastic sheets and then cooled under pressure, whereby a cohesive connection of the plastic sheets is achieved.
  • Known welding wedges are usually made of metal and thus have a high heat conductivity required for the welding process. They are usually heated by cylindrical trained electric heating cartridges, which are embedded in the heating wedge to heat it to a temperature above the melting temperature of the plastic sheets.
  • heating wedges made of different metals for example aluminum, copper, silver or steel, are often used. Heating wedges made of aluminum, copper or silver often have to be replaced after a short service life due to their low abrasion resistance and corrosion resistance. Heating wedges made of steel are more resistant to these, but require long heating times and have a significantly poorer heat distribution.
  • an electric heating wedge which consists of a ceramic material or of a ceramic composite material to avoid the disadvantages listed above, wherein the composite material of a ceramic base material and a good heat conducting metal or semi-metal is composed.
  • the disclosed hot wedge can be used for different plastic materials. It has high mechanical strength, high abrasion resistance and high temperature and thermal shock resistance. In addition, it has a high corrosive resistance to chemical influences occurring and prevents adhesion of residues of the respective heated plastics largely.
  • DE 36 40 187 A1 discloses a welding wedge which has a decreasing heat transfer capacity from the center in the direction of its side edges.
  • the hot wedge is subdivided into at least three directly adjoining sections running parallel to the feed direction, of which the middle section is made of a material with high thermal conductivity and the respective outer section is made of a material with low heat conductivity. conductivity.
  • This temperature zones of different temperature are set, which are arranged side by side transversely to the feed direction of the heating circuit, the temperature differences is essentially determined by the materials used. The temperatures of the two outer temperature zones are directly coupled to the temperature of the middle temperature zone.
  • Ceramic parts of electric heating wedges are at a high risk of breaking compared to metallic embodiments in rough everyday operation.
  • the invention is therefore based on the object to propose an electric hot wedge, in which the risk of breakage of the ceramic parts is significantly minimized and preferably has a variably adjustable temperature profile.
  • the electrical hot wedge according to the invention has a weld wedge suspension with a lateral support structure made of metal, which extends substantially over the entire length and / or width of the electrical heating resistor and mechanically stabilizes the ceramic support of the heating resistor.
  • the supporting structure may be arranged inside the welding wedge and / or may enclose the welding wedge in substantial parts.
  • weld wedge is to be understood that part of the hot wedge which is in contact with the plastic sheets to be coated during the welding process, while welding suspension means that part of the hot wedge with which the weld wedge is detachably fastened to a frame of a welding device.
  • the electrical heating resistor is not arranged, as in the prior art, in the weld wedge suspension but directly in or on the weld wedge.
  • the heating conductor is applied as a conductive layer on a ceramic substrate, wherein the heating element is protected by an abrasion-resistant, insulating cover layer. It is advantageous if the ceramic heating resistor extends over a large part of the surface of the weld wedge, wherein the body of the weld wedge can be metallic or ceramic in nature.
  • flat plate-shaped heating elements are known and available in any size or prefabricated having the structure described above.
  • Such conventional heating elements can be embedded as a heating resistor directly into corresponding provided flat chambers of the body of the welding wedge.
  • the body of the welding wedge itself can be made of an electrically insulating ceramic material and form the ceramic carrier, to which the heating conductor is applied as a conductive layer.
  • the body of the welding wedge on a metal comparable thermal conductivity, wherein no adhesion of the plastic sheets takes place at the respective contact surface of the weld wedge.
  • the support structure for stabilizing the ceramic support of the at least one heating resistor may be formed, for example, as a metal shell, which encloses the heating resistor of the welding wedge in substantial parts, wherein the metal shell has the wedge shape typical for a welding wedge.
  • a wedge-shaped support structure can directly accommodate flat ceramic heating elements or even wedge-shaped ceramic heating resistors.
  • the support structure may be formed as one or more metal ribs or metal plates which penetrate the ceramic body of the welding wedge transversely to the feeding direction to stabilize the body.
  • the rib or plate can be loose in a channel of the ceramic body or be embedded firmly and be firmly or detachably connected to the weld wedge suspension. In any case, it is expedient to attach the welding wedge detachably to the weld wedge suspension. This can be done by pressing or clamping the weld wedge, it is expedient if the weld wedge has a laterally projecting extension for attachment to the weld wedge suspension.
  • the support structure is preferably made of a corrosion-resistant metal and preferably has at least one bore, with or without thread, for a fastening screw.
  • the metal rib may, for example, show a cylindrical shape and thus be designed as a fastening screw.
  • the material of the metal weld wedge suspension is steel or silver and / or the material for the conductive layer of the heating resistor is a metal, a metal alloy or an electrically conductive ceramic.
  • the conductive layer can be applied to the ceramic carrier of the heating resistor using all industrial methods known to those skilled in the art.
  • the welding wedge on at least two temperature zones, which are preferably arranged in the feed direction of the hot wedge, ie from its leading edge to its trailing edge behind each other.
  • the temperature zones can also be arranged side by side transversely to the feed direction of the hot wedge, ie between its side edges. In this case, they can directly adjoin one another or have a certain distance from each other, wherein the temperature zones extend only in a central region of the weld wedge or can extend to its front and rear edge or up to its side edges.
  • the temperatures of the individual temperature zones are variably adjustable.
  • the at least two temperature zones are assigned either independently acting heating resistors or a common heating resistor with differently designed heating zones.
  • the heating power of the assigned heating resistors, or the assigned ones Heating zones of a heating resistor are preferably independently adjustable and preferably adjustable. So that the at least one heating resistor can act independently on the temperature zones, this is arranged in the welding wedge as described above and not, as known from the prior art, in the welding wedge suspension.
  • the temperature zones of the welding wedge of the hot wedge according to the invention is thus thus heated directly, the temperature zones each extending uniformly around the heating zone (s) of the respective heating resistor.
  • the heating power of the welding wedge in the region of the temperature zones can be individually adjusted and / or regulated.
  • the respective associated heating resistor advantageously has at least one temperature sensor, which is applied as a conductive layer on the ceramic carrier. With the respective temperature sensor, the actual temperature of the different temperature zones can be determined. The temperature values determined in this way can be used for automatic temperature control of the welding wedge and / or displayed. It is expedient if the heating resistor and the temperature sensor are formed by a common conductive layer. The temperature measurement is preferably carried out via a conductor track of the heating conductor of the heating resistor. However, it is also possible to carry out the temperature measurement via a separate conductor of the heating conductor.
  • the heating conductor must be formed differently in the region of the respective temperature turzonen.
  • the heating resistor has at least one meandering conductor track as a heating conductor whose web cross-section or track spacing over the length of the heating resistor is formed differently.
  • the web cross-section and / or the web spacing must differ from one another at least in the region of the at least two temperature zones. It is essential that the heating power per unit area in the different temperature zones is provided differently.
  • the web cross-section and / or the path distance of the two "heating resistors" may be identical.
  • FIG. 1 shows a perspective view of a heating wedge produced in one piece from metal (prior art), with a welding wedge and a welding wedge suspension;
  • Figure 2 is an illustration of a first heating wedge according to the invention in a side and front view, with a support structure which is arranged in the interior of the welding wedge;
  • FIG 3 is an illustration of a second heating wedge according to the invention in a side and front view, with a support structure enclosing the welding wedge;
  • Figure 4 shows a first manner of fastening the heating wedges of Figures 2, 3 in a side and front view;
  • FIG. 5 shows the welding wedge from FIG. 4 in various views with heating resistors applied externally to the body of the welding wedge
  • FIG. 6 shows various embodiments of the conductive layer of the heating resistor for the welding wedge according to FIGS. 3, 4;
  • Figure 7 shows a second fastening of the heating wedges of Figures 2, 3 in a side and front view
  • FIG. 8 shows a second fastening of the heating wedges of Figures 2, 3 in a side and front view.
  • FIG 1 shows a known heating wedge 1 'made of metal with a welding wedge 2' and a welding wedge suspension 3 ', which is heated by means of a conventional cylindrical heating cartridge, not shown in the drawing.
  • the welding wedge suspension 3 ' has a large bore 4 for the heating cartridge and a small bore 5 for a temperature measuring probe also not shown in the drawing.
  • fastening holes 6 are provided on the welding wedge suspension 3 'for attachment to a frame of a welding device.
  • FIGS. 2, 3 show a first or second heating wedge 1 according to the invention, which essentially has a contour known from FIG.
  • the welding wedge 2 and the welding wedge suspension 3 are formed as separate parts and releasably connected to each other.
  • the weld wedge suspension 3 which is preferably made of steel or silver, laterally on a support structure 28 made of metal, which extends substantially over the entire length and / or width of an electrical ceramic heating resistor 13 and this mechanically stabilized.
  • Figure 2 is a flat plate-shaped support structure 28 which is disposed in the interior of the welding wedge 3 and which extends transversely to the feed direction of the hot wedge between the side edges.
  • the body of the welding wedge 2 is made of a non-conductive ceramic material and forms the carrier 15 for the conductive layer 12 of the heating resistor 13, which is externally applied to the body.
  • the support structure 28 encloses the welding wedge 2 in substantial parts.
  • the heating resistor 13 is considered, which is plate-shaped and whose conductive layer 12 is applied to a flat ceramic support plate 15.
  • the support structure 28, which is formed as a wedge-shaped metal shell and made of a metal block, a receiving space in which the heating resistor 13 is embedded.
  • the conductive layer 12 is preferably protected by a ceramic cover layer, which is not shown in FIGS. 2, 3.
  • the support structure 28 is made of a corrosion resistant metal.
  • the electrical connection lines for contacting the heating resistor is not shown in all figures of the drawing. It is carried out using the methods familiar to the person skilled in the art.
  • FIG. 4 shows in the schematic representations 4a, 4b, a first fastening of the hot wedge 1 according to the invention according to the figures 2, 3.
  • the welding wedge 2, which is shown in Figure 5 in other views again, is made of ceramic material and clamped to the welding wedge suspension 3 attached.
  • the welding wedge 2 as shown in FIGS. 5a, 5b, has a preferably conical projection 7 projecting laterally from the welding wedge 2 and which is pressed against the welding wedge suspension 3 with two wedge-shaped counterparts 8 of the heating wedge 1.
  • the counterparts 8 are fixed by fastening screws 9 on the welding wedge suspension 3.
  • the fastening structure 28 of the welding wedge 2 extends into the extension 7.
  • FIG. 5 shows in FIGS. 5a, 5b the welding wedge 2 from FIG.
  • the welding wedge 2 in plan view from above and from below.
  • the welding wedge 2 on a top 10 and a bottom 11 on a conductive layer 12 of a heating resistor 13, which is protected by a cover layer, not shown in the drawing.
  • the ceramic body 14 of the welding wedge 2 forms a carrier 15 for a heating conductor 16, which is formed as a structure of the conductive layer 12.
  • the conductive layer 12 is, as can be seen in FIG. 6, differently structured in different areas of the upper / lower side 10, 11. The areas of different structure determine temperature zones 17, 18, wherein the respective Temperaturzoneh 17 and 18 are arranged opposite one another on the upper side 10 and the underside 11 of the welding wedge 2.
  • the respective two temperature zones 17, 18 are arranged one behind the other in the feed direction of the hot wedge 1 from a front edge 19 to a rear edge 20 and extend laterally to side edges 21 of the welding wedge 2, their temperatures being variable and different from each other.
  • the temperature zones 17, 18 are determined by different structures of the conductive layer 12 of the plate-shaped heating resistor 13, which is measured in the interior of the welding wedge 2 between the side edges 21 over a substantial portion of the feed direction Length of Schukeilsi extends.
  • FIG. 6 shows two structures of the conductive layer 12.
  • the heating resistor 13 which is preferably of the same design on the upper / lower side 10, 11 of the welding wedge 2, has meandering conductor tracks 22 extending between the side edges 21, their web cross-section and Track spacing in the embodiment shown in the figure 6a over the length of the heating resistor 13 are formed differently.
  • a first heating section 23 of the heating resistor 13 which is associated with the first temperature zone 17, the web widths of the conductor tracks 22 are greater than in the second heating section 24, which determines the second temperature zone 18.
  • FIG. 6b shows two heating conductors 16, which are applied in succession to the body 14 on an upper side 10 and / or a lower side 11.
  • the heating conductors 16 are not connected to each other and therefore individually controlled or regulated. They form the heating sections 23, 24 of the heating resistor 13. In the heating sections 23, 24 in each case two temperature sensors 25 are arranged between the meander-shaped extending conductor tracks 22 in both illustrated embodiments.
  • the laterally projecting extension 7 shows, in the illustrations 7a, 7b, a second type of fastening of the heating wedge 1 according to the invention.
  • the laterally projecting extension 7 extends from the front edge 19 to the trailing edge 20 of the welding wedge 2. It also also has screw holes directed perpendicular to the extension 7 26, which continue in the mounting structure 28 and through which the fastening screws 9 extend, with which the welding wedge 2 is pressed against the welding wedge suspension 3.
  • FIG 8 shows in the representation 8a, 8b, a third fastening for the hot wedge 1 according to the invention, in which the heating resistor 13 is formed as described above, wherein the attachment of the welding wedge 2 takes place at the welding wedge suspension 3 by means of fastening screws 9, the welding wedge 2 perpendicular to penetrate the side edges 21.
  • the welding wedge 2 transverse channels 27, in which the fastening screws 9 extend as a metallic support structure 28 in the form of two ribs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne une clavette électrique chauffante (1) pour un dispositif de soudage destiné à l'assemblage par soudage de bandes de matière plastique, avec une clavette de soudage (2) et une suspension de clavette de soudage (3) en métal, la clavette de soudage (2) comportant au moins une résistance électrique de chauffage (13) avec un conducteur de chauffage (16) qui est appliqué de manière indissociable sous la forme d'une couche conductrice (12) sur un support en céramique (15) et qui est de préférence protégé par une couche de finition en céramique. Selon l'invention, la suspension de clavette de soudage (2) présente latéralement une structure d'appui (28) en métal qui s'étend sensiblement sur toute la longueur et/ou largeur de la résistance électrique de chauffage (16) et stabilise mécaniquement le support (15) de la résistance électrique de chauffage (16).
EP09716908.0A 2008-03-05 2009-01-16 Clavette électrique chauffante Active EP2247433B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202008003136U DE202008003136U1 (de) 2008-03-05 2008-03-05 Elektrischer Heizkeil
PCT/EP2009/000235 WO2009109260A1 (fr) 2008-03-05 2009-01-16 Clavette électrique chauffante

Publications (2)

Publication Number Publication Date
EP2247433A1 true EP2247433A1 (fr) 2010-11-10
EP2247433B1 EP2247433B1 (fr) 2016-03-23

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US (1) US8354622B2 (fr)
EP (1) EP2247433B1 (fr)
CN (1) CN101965258B (fr)
DE (1) DE202008003136U1 (fr)
WO (1) WO2009109260A1 (fr)

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ITBO20100362A1 (it) * 2010-06-08 2011-12-09 Zocca Ohg S R L Elemento riscaldante per una macchina impacchettatrice
DE102012020839A1 (de) 2012-10-24 2014-04-24 Jackon Insulation Gmbh Herstellung von XPS-Schaumplatten großer Dicke durch Schweißen
EP2910361B1 (fr) * 2014-02-25 2017-05-03 Leister Technologies AG Soudeuse par coin chauffant
JP6811177B2 (ja) * 2016-03-16 2021-01-13 日本特殊陶業株式会社 セラミックヒータ
PL3269534T3 (pl) * 2016-07-14 2019-11-29 Leister Tech Ag Sposób łączenia materiałowego nakładających się przynajmniej częściowo warstw materiału oraz automat łączący do realizacji sposobu
DE102016117834A1 (de) 2016-09-21 2018-03-22 watttron GmbH Siegelorgan
US10143237B2 (en) * 2017-04-28 2018-12-04 Zipline Innovations, LLC Vaporizer with improved tip
EP3777473B1 (fr) * 2018-03-26 2021-11-24 Leister Technologies AG Résistance chauffante en céramique, élément de chauffage électrique ainsi qu'appareil pour chauffer un fluid
KR20220127171A (ko) * 2021-03-10 2022-09-19 와틀로 일렉트릭 매뉴팩츄어링 컴파니 구역들 내부에서 가변 출력을 가지는 히터 번들

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Also Published As

Publication number Publication date
WO2009109260A1 (fr) 2009-09-11
EP2247433B1 (fr) 2016-03-23
CN101965258B (zh) 2013-07-24
DE202008003136U1 (de) 2008-07-31
US8354622B2 (en) 2013-01-15
CN101965258A (zh) 2011-02-02
US20100326964A1 (en) 2010-12-30

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